Description of Business, Basis of Presentation, and Significant Accounting Policies (Details) bbl / d in Millions, gal / yr in Billions	12 Months Ended
	Dec. 31, 2024 gal / yr bbl / d refinery plant ethanol_plant
Description Of Business, Basis Of Presentation, And Significant Accounting Policies [Line Items]
Number of petroleum refineries owned | refinery	15
Combined throughput capacity of petroleum refining (barrels per day) | bbl / d	3.2
Number of ethanol plants owned | ethanol_plant	12
Combined production capacity of ethanol (gallons per year)	1.7
Equipment [Member]
Description Of Business, Basis Of Presentation, And Significant Accounting Policies [Line Items]
Property, plant, and equipment, useful life	20 years
Minimum [Member]
Description Of Business, Basis Of Presentation, And Significant Accounting Policies [Line Items]
Property, plant, and equipment, useful life	20 years
Typical payment due date post date of invoice terms (in days)	2 days
Maximum [Member]
Description Of Business, Basis Of Presentation, And Significant Accounting Policies [Line Items]
Property, plant, and equipment, useful life	30 years
Typical payment due date post date of invoice terms (in days)	10 days
Diamond Green Diesel Holdings LLC (DGD) [Member]
Description Of Business, Basis Of Presentation, And Significant Accounting Policies [Line Items]
Number of renewable diesel plants owned by joint venture | plant	2
Combined production capacity of renewable diesel (gallons per year)	1.2